#include "cal.h"
#include <stdio.h>

int main()
{
    printf("a + b = %d\n", add(10, 5));
    printf("a - b = %d\n", sub(10, 5));
    printf("a * b = %d\n", mul(10, 5));
    printf("a / b = %d\n", div(10, 5));

    return 0;
}
